Table 2. Analysis Results of Trace and Rare Earth Elements in Sandstone of the Shawan Formation^a.

samples	grayish-green zone		black oil zone		light gray uranium mineralized zone								light brown zone
	YC3	YC23	YC5	YC6	YC9	YC10	YC12	YC13	YC15	YC16	YC17	YC19	YC27	YC32
Li	9.88	88.74	3.23	4.57	38.42	6.37	6.14	5.09	10.24	7.22	16.78	7.31	40.64	27.14
Be	2.82	2.92	1.37	1.20	2.50	1.85	1.54	1.54	1.28	1.86	1.37	2.39	1.97	1.84
Sc	3.23	19.12	0.60	0.77	20.12	1.78	1.59	1.55	3.16	1.80	4.03	1.65	13.90	11.14
V	16.99	121.20	4.97	6.07	133.20	15.96	10.18	12.71	19.18	13.26	21.42	9.86	97.14	80.22
Cr	9.41	97.23	4.96	4.50	78.31	16.08	6.17	7.67	14.60	10.19	36.77	32.77	64.79	83.46
Mn	306.1	657.1	55.95	48.47	601.9	1064.1	197.3	163.3	189.2	190.1	259.7	72.3	1139.9	691.9
Co	1.41	20.46	0.46	0.52	37.98	1.15	2.82	1.04	2.26	0.38	1.50	0.75	11.80	8.40
Ni	6.20	50.82	1.88	2.17	95.45	4.91	2.7	2.32	7.14	1.29	7.87	13.45	37.56	40.16
Cu	3.17	38.39	1.40	1.44	52.29	2.68	4.63	1.52	3.53	2.82	3.72	3.25	32.81	25.31
Zn	11.06	120.7	8.03	9.09	147.20	9.29	9.30	6.35	8.70	6.15	13.65	6.61	79.83	60.74
Ga	5.22	22.46	5.20	4.64	26.55	6.60	5.07	4.21	5.72	3.62	6.50	3.76	15.87	14.86
Rb	51.44	151.9	70.84	65.78	95.79	51.16	49.79	48.41	48.19	46.29	59.70	45.23	89.30	77.83
Sr	429.7	231.7	85.5	89.1	1469.6	474.9	274.9	166.8	296.9	183.6	304.1	278.8	238.6	241.9
Hf	1.71	5.19	3.59	1.36	4.98	2.44	2.97	1.53	1.71	1.45	1.56	1.57	4.07	4.44
Ta	0.56	1.26	0.10	0.13	0.85	0.19	0.19	0.10	0.31	0.13	0.38	0.13	0.71	0.52
W	0.46	3.60	0.38	0.32	2.91	2.13	0.33	0.35	0.60	0.21	0.98	0.65	1.87	1.63
Tl	0.27	0.86	0.36	0.36	0.68	0.21	0.27	0.26	0.27	0.25	0.31	0.23	0.48	0.38
Pb	8.35	22.46	10.96	10.54	27.74	7.94	7.89	7.45	11.63	7.8	11.62	6.19	20.17	16.77
Th	1.99	13.02	1.49	1.62	10.20	1.85	2.80	1.49	1.81	1.93	2.74	1.95	9.06	6.18
U	22.91	8.03	0.61	0.66	177.7	1902.1	28.19	127.1	28.81	32.80	96.90	30.61	1.91	1.59
Zr	58.80	164.75	129.2	46.92	164.2	107.13	103.1	48.83	56.45	47.43	51.80	54.20	126.1	148.8
Nb	3.84	17.68	1.40	1.59	12.33	3.57	2.07	1.45	3.68	1.43	4.50	1.87	10.92	7.86
Mo	1.35	3.05	0.35	0.23	461.8	3818.2	10.06	27.54	13.78	9.05	44.78	76.65	1.17	1.73
Sn	0.88	4.28	0.38	0.39	3.21	7.61	0.51	0.72	0.97	0.65	1.39	0.85	2.59	1.96
Cs	1.78	14.83	2.25	2.10	8.71	2.10	1.83	1.79	2.08	1.60	2.84	1.83	8.20	5.50
Ba	303.7	393.8	268.5	274.7	486.4	403.3	197.8	193.2	204.2	201.6	195.2	200.4	510.6	653.7
La	10.18	33.44	4.92	6.21	34.54	3.91	5.82	5.71	5.16	3.71	7.71	4.08	29.44	23.47
Ce	19.42	62.25	10.18	12.49	66.98	7.73	11.29	12.06	9.00	6.36	16.52	6.24	47.71	39.50
Pr	2.32	8.34	0.87	1.22	9.22	0.81	1.29	1.52	0.99	0.61	1.78	0.54	6.90	5.64
Nd	9.53	31.39	3.81	5.10	36.04	3.59	5.51	7.65	4.36	2.80	7.37	2.47	26.16	22.10
Sm	1.92	6.18	0.76	1.00	6.87	0.82	1.15	1.75	0.91	0.58	1.51	0.52	5.17	4.55
Eu	0.48	1.20	0.23	0.29	1.33	0.18	0.26	0.48	0.25	0.15	0.38	0.13	1.10	1.05
Gd	1.73	5.15	0.70	0.88	4.80	0.74	1.11	1.88	0.95	0.56	1.37	0.57	4.62	4.14
Tb	0.29	0.93	0.11	0.13	0.82	0.14	0.19	0.32	0.16	0.08	0.23	0.09	0.81	0.73
Dy	1.60	4.73	0.64	0.76	3.89	0.90	1.15	1.78	1.00	0.56	1.32	0.67	4.15	3.82
Ho	0.35	1.05	0.14	0.16	0.82	0.20	0.28	0.39	0.24	0.13	0.31	0.16	0.93	0.86
Er	0.96	2.84	0.40	0.45	2.20	0.61	0.82	1.05	0.71	0.39	0.88	0.49	2.49	2.33
Tm	0.14	0.41	0.06	0.07	0.33	0.10	0.12	0.15	0.11	0.06	0.13	0.08	0.36	0.33
Yb	0.93	2.73	0.41	0.47	2.27	0.71	0.86	1.04	0.73	0.44	0.89	0.55	2.37	2.22
Lu	0.14	0.42	0.06	0.07	0.35	0.11	0.14	0.16	0.11	0.07	0.14	0.09	0.37	0.35
Y	10.41	27.55	6.18	3.98	20.76	6.56	10.00	9.57	7.76	4.02	9.57	4.71	25.60	23.93
ΣREE	50.0	161.1	23.28	29.29	170.4	20.54	29.96	35.93	24.66	16.51	40.54	16.68	132.5	111.1
LREE	43.85	142.8	20.76	26.30	154.9	17.03	25.31	29.17	20.67	14.20	35.28	13.99	116.4	96.3
HREE	6.15	18.25	2.52	2.99	15.48	3.5	4.66	6.76	4.00	2.30	5.27	2.70	16.08	14.76
LREE/HREE	7.13	7.82	8.25	8.80	10.01	4.86	5.43	4.31	5.16	6.16	6.70	5.19	7.24	6.52
(La/Yb)N	7.83	8.77	8.63	9.49	10.89	3.93	4.87	3.95	5.09	6.00	6.18	5.34	8.91	7.58
La/Sc	3.15	1.74	8.22	8.02	1.71	2.20	3.66	3.67	1.63	2.06	1.91	2.4	2.1	2.10
La/Th	5.12	2.56	3.30	3.82	3.38	2.10	2.08	3.84	2.84	1.92	2.81	2.09	3.24	3.79
Co/Th	0.7	1.57	0.3	0.3	3.7	0.62	1.00	0.7	1.2	0.19	0.54	0.3	1.30	1.36
δU	0.98	0.78	0.71	0.71	0.99	0.99	0.98	0.99	0.98	0.99	0.99	0.98	0.55	0.6
V/Cr	1.80	1.24	1.0	1.35	1.70	0.99	1.64	1.65	1.31	1.30	0.58	0.3	1.49	0.9
Ni/Co	4.40	2.48	4.12	4.14	2.51	4.25	0.9	2.22	3.16	3.41	5.25	17.9	3.1	1.68
Sr/Ba	1.41	0.58	0.31	0.32	3.02	1.17	1.38	0.86	1.45	0.91	1.55	1.39	0.46	0.37
Sr/Cu	135.6	6.03	61.14	61.85	28.10	177.1	59.35	109.7	84.0	65.15	81.64	85.87	7.27	9.55

^aN is standard for chondrite. LREE = La + Ce + Pr + Nd + Sm + Eu, HREE = Gd + Tb + Dy + Ho + Er + Tm + Yb + Lu. δU = U/(0.5*(Th/3 + U)).³⁸